Detailed Weather Data for Project: SKIA

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. -901.00 7.41 75.21 2.29 01Jan2018 9 a.m. -901.00 9.08 71.99 136.63 01Jan2018 10 a.m. -901.00 6.96 63.47 330.72 01Jan2018 11 a.m. -901.00 7.12 54.01 488.16 01Jan2018 12 p.m. -901.00 6.44 49.89 587.70 01Jan2018 1 p.m. -901.00 5.90 45.86 612.82 01Jan2018 2 p.m. -901.00 4.31 41.23 574.07 01Jan2018 3 p.m. -901.00 6.05 38.38 491.38 01Jan2018 4 p.m. -901.00 6.33 37.14 330.07 01Jan2018 5 p.m. -901.00 6.99 37.23 127.81 01Jan2018 6 p.m. -901.00 6.30 40.50 0.45 01Jan2018 7 p.m. -901.00 11.62 48.46 0.00 01Jan2018 8 p.m. -901.00 5.18 47.86 0.00 01Jan2018 9 p.m. -901.00 5.84 49.67 0.00 01Jan2018 10 p.m. -901.00 3.57 51.49 0.00 01Jan2018 11 p.m. -901.00 4.73 51.85 0.00 02Jan2018 12 a.m. -901.00 6.68 49.44 0.01 02Jan2018 1 a.m. -901.00 6.88 51.41 0.00 02Jan2018 2 a.m. -901.00 5.67 53.71 0.00 02Jan2018 3 a.m. -901.00 4.05 56.44 0.00 02Jan2018 4 a.m. -901.00 3.85 56.73 0.00 02Jan2018 5 a.m. -901.00 5.77 56.23 0.01 02Jan2018 6 a.m. -901.00 5.82 57.10 0.00 02Jan2018 7 a.m. -901.00 6.16 57.52 0.00 Accuml. Values 0.00 148.71 1242.82 3682.12 Num. Valid Values 0 24 24 24 Avg. Values 6.20 51.78 153.42 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -17.78 239.27 51.78 316.59 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4822 definition: xcompl = 1 - (RELH_avg/100) TdC = -25.3192 definition: TdC = TAIR_avg - ((14.55 + (0.114*TAIR_avg))*xcompl +pow((2.5 + 0.007*TAIR_avg)*xcompl, 3) + (15.9 +0.117*TAIR_avg)*pow(xcompl, 14)) del_lambda1 = 0.1635 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.8365 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.4859 definition: Qn = 0.00714*SRAD_avg + 0.00000526*SRAD_avg*pow(TAIR_avg+17.8, 1.87) +0.00000394*pow(SRAD_avg, 2) - 0.00000000239*pow(SRAD_avg, 2)*pow(TAIR_avg-7.2, 2) - 1.02 es_ea = 0.7340 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.8485 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.038 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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